Figure 3.
RLWM model fit parameters. Parameters fit on subjects' behavior with the RLWM model, for the HC group and patients (SZ). Red indicates a significant difference between groups. Error bars indicate SEM. A, WM-specific parameter rates show less robust WM for patients (lower capacity N and faster decay rate φWM). B, RL-specific parameters (learning rate α and decay φRL) show no difference. C, Patients rely a priori less on WM (ρWM) and perseverate more than controls. D, Despite worse performance in patients, noise parameters show no difference between groups, indicating that this is attributable to deficit in learning more than deficit in choice. E, Absolute value of the weights on model parameters for the first two principal components. Blue bars indicate a positive weight and red bars a negative weight. The first component loads strongly on the two RL parameters, whereas the second component loads strongly on the four WM parameters. pers., Perseverate. F, The second component is correlated with an independent classic measure of working memory across all subjects (black regression line) and within each group.